Bibliography of works done on CAPTCHA
Sajad Shirali-Shahreza, Sajad Shirali-Shahreza · 2008
Nowadays, a great amount of information is circulated through the Internet. Some of them exclusively belongs to a special group of users and requires protection and safeguarding against unauthorized access. To this end, a category of systems called HIP (human interactive proof) have been introduced to distinguish between various groups of users.